Mercurial > ldforge / file diff

--- a/misc.cpp	Mon Mar 18 04:03:05 2013 +0200
+++ b/misc.cpp	Mon Mar 18 12:15:23 2013 +0200
@@ -1,24 +1,24 @@
 #include "common.h"
 #include <math.h>
 
-double GetWordFloat (str& s, const ushort n) {
+double getWordFloat (str& s, const ushort n) {
 	return atof ((s / " ")[n]);
 }
 
-long GetWordInt (str& s, const ushort n) {
+long getWordInt (str& s, const ushort n) {
 	return atol ((s / " ")[n]);
 }
 
-vertex ParseVertex (str& s, const ushort n) {
+vertex parseVertex (str& s, const ushort n) {
 	vertex v;
-	v.x = GetWordFloat (s, n);
-	v.y = GetWordFloat (s, n + 1);
-	v.z = GetWordFloat (s, n + 2);
+	v.x = getWordFloat (s, n);
+	v.y = getWordFloat (s, n + 1);
+	v.z = getWordFloat (s, n + 2);
 	
 	return v;
 }
 
-void StripWhitespace (str& s) {
+void stripWhitespace (str& s) {
 	str other;
 	
 	for (size_t i = 0; i < ~s; i++)
@@ -54,4 +54,39 @@
 		zRep -= 1;
 	
 	return zRep;
+}
+
+// =============================================================================
+// isNumber (str&)
+//
+// Returns whether a given string represents a floating point number
+// TODO: Does LDraw support scientific notation?
+// =============================================================================
+bool isNumber (str& zToken) {
+	char* cpPointer = &zToken[0];
+	bool bGotDot = false;
+	
+	// Allow leading hyphen for negatives
+	if (*cpPointer == '-')
+		cpPointer++;
+	
+	while (*cpPointer != '\0') {
+		if (*cpPointer == '.' && !bGotDot) {
+			// Decimal point
+			bGotDot = true;
+			cpPointer++;
+			continue;
+		}
+		
+		if (*cpPointer >= '0' && *cpPointer <= '9') {
+			cpPointer++;
+			continue; // Digit
+		}
+		
+		// If the above cases didn't catch this character, it was
+		// illegal and this is therefore not a number.
+		return false;
+	}
+	
+	return true;
 }
\ No newline at end of file